Alger County · Michigan

Grand Sable Lake

Soundings in feet · 656 acres · deepest 85 ft

Today on the lake

Updated 9 Oct 2026, 3:24 am EDT. Get alerts for Grand Sable Lake

WEATHEROvernight: mostly clear, 38°F, wind NW 10 mph. Friday: mostly sunny, 56°F, wind NW 5 to 10 mph.

WARNINGSNo weather or fire warnings in effect.

FIRENo wildfires or prescribed burns reported within 25 miles.

BURNINGCampfires and debris burning: check today's status with Michigan DNR.

ALGAENo cyanobacteria detected by satellite on 4 Oct 2026, the latest clear-sky image.

National Weather Service; National Interagency Fire Center; U.S. EPA CyAN satellite; Michigan DHHS; Michigan DNR. Weather, warnings, fires and satellite refresh when you open the page (checked at most hourly).

Depth map

17 contours, 5 to 85 ft

0510152025303540455055606570758085feet

Michigan DNR survey, fetched 7 Oct 2026. Not for navigation.

Size and depth

656 acres · deepest 85 ft (measured) · shoreline about 6.1 mi · clarity about 9 ft

Grand Sable Lake is the 4th largest of the 169 named lakes of 10 acres or more in Alger County. By Michigan DNR survey it is the deepest of the 87 with a measured depth. Its water is clearer than 91 of the other 123 lakes in the county with satellite clarity readings. Its shoreline measures about 6.1 miles along the state outline. About 41% of its area is deeper than 45 ft.

Ranks against Alger County lakes in Michigan hydrography, Michigan DNR lake surveys and Michigan EGLE satellite clarity; shoreline measured from the state outline. How we measure

Fishing

Michigan DNR has stocked Grand Sable Lake 32 times since 1979. The most recent stocking was 19,998 lake trout on 12 October 2005. Species stocked: lake trout.

32 stockings, 1979 to 2005, log scale

Latest: 12 Oct 2005: 19,998 lake trout.

12 Oct 2005STOCKED19,998 lake trout

20 Oct 2004STOCKED19,995 lake trout

26 Nov 2003STOCKED19,997 lake trout

4 Oct 2002STOCKED20,000 lake trout

10 Oct 2001STOCKED20,000 lake trout

28 Sep 2000STOCKED20,000 lake trout

Source: Michigan DNR Fisheries, fetched 7 Oct 2026. How we measure

Where the deep water is

Show water deeper than

Measured from Michigan DNR contours. How we measure

Water quality

Average water clarity is about 9 ft (Secchi depth 2.6 m, satellite readings 2018–23).

Clarity 8.7 ft of 85 ft

Michigan EGLE satellite clarity, fetched 7 Oct 2026.

Email me about Grand Sable LakeWhen it is stockedMichigan DNR has stocked Grand Sable Lake 32 times since 1979, most recently 19,998 lake trout on 12 October 2005. None in the last five years.When algae is reported or testedMichigan DHHS has no records for this lake yet. We email when the first one is posted.When satellite sees a bloom startEPA satellite, checked daily, June to October. We email when a bloom first shows on two clear days, not every day it stays. In 2026 that happened on 24 Sep.Any lake in Alger CountyStockings and algae records on every lake in the county. In 2026 so far: 6 emails.

In 2026 so far, these alerts would have sent you 1 email about Grand Sable Lake: 24 Sep.

Email address

At most one email a week per lake. We email you a link to confirm before any alert is sent; every email has a one-click unsubscribe.

Nearby lakes with measured depth

Fox Lake30 ft deep · 3.2 mi · Alger County

East Bay Lake46 ft deep · 5.1 mi · Alger County

no name15 ft deep · 5.2 mi · Alger County

Bearfoot Lake10 ft deep · 5.3 mi · Alger County

McKay Lake12 ft deep · 5.3 mi · Alger County

Niemi Lake19 ft deep · 5.7 mi · Alger County

Michigan DNR survey; straight-line miles.

Common questions

How deep is Grand Sable Lake?

Grand Sable Lake is 85 feet at its deepest point, measured by Michigan DNR survey. It covers 656 acres.

Is Grand Sable Lake stocked with fish?

Yes. Michigan DNR has stocked it 32 times since 1979, most recently 19,998 lake trout on 12 October 2005.

How much of Grand Sable Lake is deeper than 10 feet?

About 82% of the lake's area is deeper than 10 feet, measured from Michigan DNR depth contours.